Marc Diener, Ph.D.

Marc Diener
Marc Diener


Dr. Marc Diener is a licensed clinical psychologist who specializes in the treatment of substance use disorders, with experience working in day treatment, intensive outpatient, outpatient, and private practice settings. His approach to treatment is an integrative one, known as Assimilative Psychodynamic Psychotherapy, in which psychodynamic interventions are used together with cognitive, behavioral, and motivational interviewing techniques.

Prior to joining Wholeview Wellness® Centers, Dr. Diener served as Associate Professor in the Clinical Psychology Doctoral Program at Long Island University—Post from 2012-2020. From 2007-2012, he was an Assistant Professor at the American School of Professional Psychology, Argosy University, Washington, DC. Dr. Diener graduated Summa Cum Laude with a B.A. in Psychology from Yeshiva University, and he earned his M.A. as well as his Ph.D. in Clinical Psychology from Adelphi University. He completed his predoctoral internship at St. Luke’s Roosevelt Hospital Center, University Hospital of Columbia University College of Physicians and Surgeons, and his postdoctoral fellowship at The Addiction Institute of NY (St. Luke’s Roosevelt Hospital Center, University Hospital of Columbia University College of Physicians and Surgeons).

Dr. Diener’s research has examined psychotherapy process and outcome as well as personality assessment. His publications have focused on attachment, psychotherapy technique, psychotherapy outcome, application of meta-analytic methodology, as well as self-report and performance-based measures of personality. He has over two dozen publications in peer-reviewed journals, edited books, or other publication outlets. Dr. Diener serves as a Consulting Editor for Psychotherapy, Journal of Psychotherapy Integration, and Journal of Contemporary Psychotherapy. He previously served as a Consulting Editor for the Journal of Personality Assessment. Dr. Diener has also served as an ad hoc reviewer for a number of other journals, including Bulletin of the Menninger Clinic, The Journal of Nervous and Mental Disease, Clinical Psychology: Science and Practice, Psychiatry Research, Psychotherapy Research, Addiction Research and Theory, Journal of Counseling Psychology, Psychoanalytic Psychology, and the Journal of Personality Assessment. He was awarded the status of Fellow by the Division of Independent Practice (Division 42) of the American Psychological Association.